The all metal HP-12A is a modification of the original HP-12 of R. E. Schreder, which was a one-of-a-kind built to fly in the 1965 World Championships at South Cerney, England.

The Standard Class HP-12 was derived from the HP-11. The HP-11, HP-11 A and HP-12 were built by Airmate at Toledo, Ohio-a company formed by Mr Schreder.

HP-12A
Wing span: 16.64m / 54.6ft
Wing area: 12.85sq.m / 138.3sq.ft
Empty Weight: 230kg / 525lb
Payload: 103kg / 230lb
Gross Weight: 343kg / 755lb
Wing Load: 26.69kg/sq.m / 5.45lb/sq.ft
Water Ballast: 0
Seats: 1
Airfoil: Wortmann FX 61-163
Aspect ratio: 21.6
L/DMax: 39 89 kph / 48 kt / 55 mph
MinSink: 0.55 m/s / 1.8 fps / 1.07 kt